RD-005: Heighliner 0.1.0
Your files have tiers now. Hot, warm, cold, frozen. Like wine. The frozen ones get forgotten, then thrown away. Eventually.
Heighliner is a native macOS app that watches the directories you choose, moves files according to rules you write, and sorts them by how recently you touched them. It also shows you, in a treemap, exactly where your disk went. You will not like the answer.

The data is invented. Mine is worse.
Rules are TOML, first match wins, and there is a dry run switch. Use it. Read the log. Then decide whether you trust your own rules.
You do not, yet. That is healthy.
Source and build instructions: github.com/nomdemalin/heighliner
MIT or Apache-2.0. No answers will be given. Voilà.